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Vlastnosti spreje a rozložení tekutiny u víceotvorových trysek pro průmyslové hořáky

dc.contributor.authorJedelský, Jancs
dc.contributor.authorJícha, Miroslavcs
dc.date.accessioned2020-08-04T11:02:38Z
dc.date.available2020-08-04T11:02:38Z
dc.date.issued2016-03-05cs
dc.identifier.citationApplied Thermal Engineering. 2016, vol. 96, issue 1, p. 286-296.en
dc.identifier.issn1359-4311cs
dc.identifier.other120495cs
dc.identifier.urihttp://hdl.handle.net/11012/138395
dc.description.abstractThe present paper provides an experimental study and optimization of multi-hole effervescent atomizers for industrial burners using oil-based fossil, bio- or waste fuels with prospects of emission reduction. Several multi-hole nozzles were designed based on our previous work. We probed the spray quality by Phase-Doppler anemometry. 3-D plots of Sauter mean diameter and mean droplet velocity demonstrate their spatial distribution within the spray. The effect of geometrical and operational factors on the spray is discussed. Droplet size–velocity correlations as well as the size and velocity distributions are presented, and differences are found against other investigations. A spray macrostructure is photographically observed and spray cone angles of the multi-hole nozzles are analysed. An internal two-phase flow is estimated using the Baker’s map for horizontal two-phase flow. Our previous two-phase flow visualizations suggested a liquid–gas gravitational separation when the multi-hole atomizer operated horizontally. This issue is addressed here; the results of spray heterogeneity measurements document that fuel flow rates through individual exit holes differ significantly. This difference spans between 0 and 70% depending on the nozzle design and flow regime. Effervescent sprays are unsteady under some operating conditions; spray unsteadiness was detected at low pressure and low gas-to-liquid-ratios.en
dc.description.abstractTato práce poskytuje experimentální data a optimalizaci víceotvorových trysek pro průmyslové hořáky na fosilní paliva na bázi oleje, bio- nebo odpadních paliva s cílem na snižování emisí.cs
dc.formattextcs
dc.format.extent286-296cs
dc.format.mimetypeapplication/pdfcs
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofApplied Thermal Engineeringcs
dc.relation.urihttp://www.sciencedirect.com/science/article/pii/S1359431115013253cs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectDroplet sizeen
dc.subjectEffervescent atomizationen
dc.subjectLiquid–gas separationen
dc.subjectMulti-hole atomizersen
dc.subjectSpray unsteadinessen
dc.subjectTwo-phase flowen
dc.titleSpray characteristics and liquid distribution of multi-hole effervescent atomisers for industrial burnersen
dc.title.alternativeVlastnosti spreje a rozložení tekutiny u víceotvorových trysek pro průmyslové hořákycs
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. EÚ-odbor termomechaniky a techniky prostředícs
sync.item.dbidVAV-120495en
sync.item.dbtypeVAVen
sync.item.insts2021.02.26 16:52:45en
sync.item.modts2021.02.26 16:14:14en
dc.coverage.issue1cs
dc.coverage.volume96cs
dc.identifier.doi10.1016/j.applthermaleng.2015.11.079cs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1359-4311/cs
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionacceptedVersionen


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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Except where otherwise noted, this item's license is described as Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International